foo.c: In function 'main':
foo.c:9:9: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
9 | scanf("%d ",&n);
| ^~~~~
foo.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
+++ |+#include <stdio.h>
1 | int main()
foo.c:9:9: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
9 | scanf("%d ",&n);
| ^~~~~
foo.c:9:9: note: include '<stdio.h>' or provide a declaration of 'scanf'
foo.c:28:17: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
28 | printf("%d ",b[i]);
| ^~~~~~
foo.c:28:17: note: include '<stdio.h>' or provide a declaration of 'printf'
foo.c:28:17: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
foo.c:28:17: note: include '<stdio.h>' or provide a declaration of 'printf'
foo.c:5:13: warning: unused variable 'a' [-Wunused-variable]
5 | int a=0;
| ^
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